A or D I think...sorry if it’s wrong
Answer is: <span>because dissolved compounds can crystallizing from solution during filtration and forming crystals on the filter paper or funnel.
</span>Recrystallization<span> is a technique used to purify chemicals by dissolving both impurities and a compound in an appropriate solvent, either compound or impurities can be removed from the solution, leaving the other behind.</span>
Density equals mass divided by volume so we take 6 and divide it by 30 which will give us 0.2 grams per millimeter